Steema: Represent DBChart in different colors

Hello,
I would like to represent a DBChart depending on the values ​​in different colors.
I get the values ​​from the database.
The change of color I have managed.
How can I assign multiple values ​​to a series and graph them?

query1.open('select * from artikel');
  query1.First;
  while not query1.Eof do
  begin
    if query1.FieldByName('preis').Value < query1.FieldByName('minimum').Value then
      DBChart1.Series[1].Color:=clred;

    else
      DBChart1.Series[1].Color:=clblue; 

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